Realization of multifunctional optical devices based on valley topological photonic crystals with triangular lattice

被引：0
作者：
Gao, Yong-Feng [1 ,2 ,3 ]
Sun, Ming-Yang [1 ]
Yao, Tian-Hao [1 ]
Li, Sheng-Yi [1 ]
Zhou, Shu-Yang [1 ]
Yang, Ming [1 ]
Hou, Qi-Chao [4 ]
机构：
[1] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Peoples R China
[2] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
[3] Shanghai Jiao Tong Univ, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China
[4] Hunan Univ, Coll Mech & Vehicle Engn, Natl Engn Res Ctr High Efficiency Grinding, Changsha 410082, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2025年 / 579卷
基金：
中国国家自然科学基金;
关键词：
Triangular valley photonic crystals; Topological edge and corner states; Frequency dividers; Light routers; Logic gates; STATES; LASER;
D O I：
10.1016/j.optcom.2025.131549
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The emergence of valley Hall topological photonic crystals (VPCs) has driven advancements in the field of optical applications such as optical communication and optical computing. In this work, we propose valley photonic crystals with triangular lattice composed of silicon rods to achieve topological edge states (TESs) and topological corner states (TCSs), and investigate the influence of two different domain interfaces of bearded-shaped and zigzag-shaped between two VPCs with opposite valley Chern numbers on TESs and TCSs. TESs and TCSs obtained from different interfaces have different frequencies and the robustness of them to defects is demonstrated. A rhomboidal hybrid structure with various valley interfaces is designed to achieve the functions of frequency division, beam splitting and three-channel photonic router based on TESs. In addition, a rhomboidal hybrid VPC waveguide-cavity coupling system is proposed, which comprises a Y-shaped air waveguide and two triangular box-shaped cavities with different domain interfaces. Both 'AND gate' and 'OR gate' logic gate functionalities can be achieved in the same structure corresponding to different frequency ranges by the coupling of air waveguides and box-shaped cavities utilizing the strong localization of corner states. This work provides a new approach for integrated devices, particularly in the fields of integrated circuits and integrated photonic devices, based on triangular photonic crystals.
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页数：10
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